I say use the stats for Water Elemental out of the Monster Manual and replace some statistics like immunities and resistances with those appropriate to it's metallic nature. But the attacks should crossover fairly well, as well as the method of movement.
That's -if- you want a monster. If...
Re: Re: Is Melf's acid arrow magical?
Except that It -isn't- creating non-magical fire in the case of Fireball. You have to look at the laws of physics that the spell is stomping on in it's descriptor. It specifically dictates how the fire occurs and behaves.
And it's Evocation. If it were...
Depending on the race your player wants, there should be an "ECL" modifier for the particular race. Such as if you wanted to play a Drow from the Forgotten Realms setting, then your ECL goes up by three or four effectively making you a level 1 character requiring an opressive amount of...